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Diffstat (limited to 'fluent-bit/src/record_accessor/flb_ra_parser.c')
-rw-r--r--fluent-bit/src/record_accessor/flb_ra_parser.c365
1 files changed, 365 insertions, 0 deletions
diff --git a/fluent-bit/src/record_accessor/flb_ra_parser.c b/fluent-bit/src/record_accessor/flb_ra_parser.c
new file mode 100644
index 000000000..9f7142950
--- /dev/null
+++ b/fluent-bit/src/record_accessor/flb_ra_parser.c
@@ -0,0 +1,365 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/* Fluent Bit
+ * ==========
+ * Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/flb_slist.h>
+#include <fluent-bit/flb_mem.h>
+#include <fluent-bit/flb_sds.h>
+#include <fluent-bit/flb_log.h>
+#include <fluent-bit/record_accessor/flb_ra_parser.h>
+
+#include "ra_parser.h"
+#include "ra_lex.h"
+
+int flb_ra_parser_subkey_count(struct flb_ra_parser *rp)
+{
+ if (rp == NULL || rp->key == NULL) {
+ return -1;
+ }
+ else if (rp->type != FLB_RA_PARSER_KEYMAP) {
+ return 0;
+ }
+ else if(rp->key->subkeys == NULL) {
+ return -1;
+ }
+
+ return mk_list_size(rp->key->subkeys);
+}
+
+void flb_ra_parser_dump(struct flb_ra_parser *rp)
+{
+ struct mk_list *head;
+ struct flb_ra_key *key;
+ struct flb_ra_subentry *entry;
+
+ key = rp->key;
+ if (rp->type == FLB_RA_PARSER_STRING) {
+ printf("type : STRING\n");
+ printf("string : '%s'\n", key->name);
+ }
+ if (rp->type == FLB_RA_PARSER_REGEX_ID) {
+ printf("type : REGEX_ID\n");
+ printf("integer : '%i'\n", rp->id);
+ }
+ if (rp->type == FLB_RA_PARSER_TAG) {
+ printf("type : TAG\n");
+ }
+ if (rp->type == FLB_RA_PARSER_TAG_PART) {
+ printf("type : TAG[%i]\n", rp->id);
+ }
+ else if (rp->type == FLB_RA_PARSER_KEYMAP) {
+ printf("type : KEYMAP\n");
+ if (rp->key) {
+ printf("key name : %s\n", key->name);
+ mk_list_foreach(head, key->subkeys) {
+ entry = mk_list_entry(head, struct flb_ra_subentry, _head);
+ if (entry->type == FLB_RA_PARSER_STRING) {
+ printf(" - subkey : %s\n", entry->str);
+ }
+ else if (entry->type == FLB_RA_PARSER_ARRAY_ID) {
+ printf(" - array id: %i\n", entry->array_id);
+ }
+ }
+ }
+ }
+}
+
+static void ra_parser_subentry_destroy_all(struct mk_list *list)
+{
+ struct mk_list *tmp;
+ struct mk_list *head;
+ struct flb_ra_subentry *entry;
+
+ mk_list_foreach_safe(head, tmp, list) {
+ entry = mk_list_entry(head, struct flb_ra_subentry, _head);
+ mk_list_del(&entry->_head);
+ if (entry->type == FLB_RA_PARSER_STRING) {
+ flb_sds_destroy(entry->str);
+ }
+ flb_free(entry);
+ }
+}
+
+int flb_ra_parser_subentry_add_string(struct flb_ra_parser *rp, char *key)
+{
+ struct flb_ra_subentry *entry;
+
+ entry = flb_malloc(sizeof(struct flb_ra_subentry));
+ if (!entry) {
+ flb_errno();
+ return -1;
+ }
+
+ entry->type = FLB_RA_PARSER_STRING;
+ entry->str = flb_sds_create(key);
+ if (!entry->str) {
+ flb_errno();
+ flb_free(entry);
+ return -1;
+ }
+ mk_list_add(&entry->_head, rp->slist);
+
+ return 0;
+}
+
+int flb_ra_parser_subentry_add_array_id(struct flb_ra_parser *rp, int id)
+{
+ struct flb_ra_subentry *entry;
+
+ entry = flb_malloc(sizeof(struct flb_ra_subentry));
+ if (!entry) {
+ flb_errno();
+ return -1;
+ }
+
+ entry->type = FLB_RA_PARSER_ARRAY_ID;
+ entry->array_id = id;
+ mk_list_add(&entry->_head, rp->slist);
+
+ return 0;
+}
+
+
+struct flb_ra_key *flb_ra_parser_key_add(struct flb_ra_parser *rp, char *key)
+{
+ struct flb_ra_key *k;
+
+ k = flb_malloc(sizeof(struct flb_ra_key));
+ if (!k) {
+ flb_errno();
+ return NULL;
+ }
+
+ k->name = flb_sds_create(key);
+ if (!k->name) {
+ flb_errno();
+ flb_free(k);
+ return NULL;
+ }
+ k->subkeys = NULL;
+
+ return k;
+}
+
+struct flb_ra_array *flb_ra_parser_array_add(struct flb_ra_parser *rp, int index)
+{
+ struct flb_ra_array *arr;
+
+ if (index < 0) {
+ return NULL;
+ }
+
+ arr = flb_malloc(sizeof(struct flb_ra_array));
+ if (!arr) {
+ flb_errno();
+ return NULL;
+ }
+
+ arr->index = index;
+ arr->subkeys = NULL;
+
+ return arr;
+}
+
+struct flb_ra_key *flb_ra_parser_string_add(struct flb_ra_parser *rp,
+ char *str, int len)
+{
+ struct flb_ra_key *k;
+
+ k = flb_malloc(sizeof(struct flb_ra_key));
+ if (!k) {
+ flb_errno();
+ return NULL;
+ }
+
+ k->name = flb_sds_create_len(str, len);
+ if (!k->name) {
+ flb_errno();
+ flb_free(k);
+ return NULL;
+ }
+ k->subkeys = NULL;
+
+ return k;
+}
+
+static struct flb_ra_parser *flb_ra_parser_create()
+{
+ struct flb_ra_parser *rp;
+
+ rp = flb_calloc(1, sizeof(struct flb_ra_parser));
+ if (!rp) {
+ flb_errno();
+ return NULL;
+ }
+ rp->type = -1;
+ rp->key = NULL;
+ rp->slist = flb_malloc(sizeof(struct mk_list));
+ if (!rp->slist) {
+ flb_errno();
+ flb_free(rp);
+ return NULL;
+ }
+ mk_list_init(rp->slist);
+
+ return rp;
+}
+
+struct flb_ra_parser *flb_ra_parser_string_create(char *str, int len)
+{
+ struct flb_ra_parser *rp;
+
+ rp = flb_ra_parser_create();
+ if (!rp) {
+ flb_error("[record accessor] could not create string context");
+ return NULL;
+ }
+
+ rp->type = FLB_RA_PARSER_STRING;
+ rp->key = flb_malloc(sizeof(struct flb_ra_key));
+ if (!rp->key) {
+ flb_errno();
+ flb_ra_parser_destroy(rp);
+ return NULL;
+ }
+ rp->key->subkeys = NULL;
+ rp->key->name = flb_sds_create_len(str, len);
+ if (!rp->key->name) {
+ flb_ra_parser_destroy(rp);
+ return NULL;
+ }
+
+ return rp;
+}
+
+struct flb_ra_parser *flb_ra_parser_regex_id_create(int id)
+{
+ struct flb_ra_parser *rp;
+
+ rp = flb_ra_parser_create();
+ if (!rp) {
+ flb_error("[record accessor] could not create string context");
+ return NULL;
+ }
+
+ rp->type = FLB_RA_PARSER_REGEX_ID;
+ rp->id = id;
+ return rp;
+}
+
+struct flb_ra_parser *flb_ra_parser_tag_create()
+{
+ struct flb_ra_parser *rp;
+
+ rp = flb_ra_parser_create();
+ if (!rp) {
+ flb_error("[record accessor] could not create tag context");
+ return NULL;
+ }
+
+ rp->type = FLB_RA_PARSER_TAG;
+ return rp;
+}
+
+struct flb_ra_parser *flb_ra_parser_tag_part_create(int id)
+{
+ struct flb_ra_parser *rp;
+
+ rp = flb_ra_parser_create();
+ if (!rp) {
+ flb_error("[record accessor] could not create tag context");
+ return NULL;
+ }
+
+ rp->type = FLB_RA_PARSER_TAG_PART;
+ rp->id = id;
+
+ return rp;
+}
+
+struct flb_ra_parser *flb_ra_parser_meta_create(char *str, int len)
+{
+ int ret;
+ yyscan_t scanner;
+ YY_BUFFER_STATE buf;
+ flb_sds_t s;
+ struct flb_ra_parser *rp;
+ struct flb_ra_key *key;
+
+ rp = flb_ra_parser_create();
+ if (!rp) {
+ flb_error("[record accessor] could not create meta context");
+ return NULL;
+ }
+
+ /* Temporal buffer of string with fixed length */
+ s = flb_sds_create_len(str, len);
+ if (!s) {
+ flb_errno();
+ flb_ra_parser_destroy(rp);
+ return NULL;
+ }
+
+ /* Flex/Bison work */
+ flb_ra_lex_init(&scanner);
+ buf = flb_ra__scan_string(s, scanner);
+
+ ret = flb_ra_parse(rp, s, scanner);
+
+ /* release resources */
+ flb_sds_destroy(s);
+ flb_ra__delete_buffer(buf, scanner);
+ flb_ra_lex_destroy(scanner);
+
+ /* Finish structure mapping */
+ if (rp->type == FLB_RA_PARSER_KEYMAP) {
+ if (rp->key) {
+ key = rp->key;
+ key->subkeys = rp->slist;
+ rp->slist = NULL;
+ }
+ }
+
+ if (ret != 0) {
+ flb_ra_parser_destroy(rp);
+ return NULL;
+ }
+
+ return rp;
+}
+
+void flb_ra_parser_destroy(struct flb_ra_parser *rp)
+{
+ struct flb_ra_key *key;
+
+ key = rp->key;
+ if (key) {
+ flb_sds_destroy(key->name);
+ if (key->subkeys) {
+ ra_parser_subentry_destroy_all(key->subkeys);
+ flb_free(key->subkeys);
+ }
+ flb_free(rp->key);
+ }
+ if (rp->slist) {
+ ra_parser_subentry_destroy_all(rp->slist);
+ flb_free(rp->slist);
+ }
+ flb_free(rp);
+}
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